Nippon Thompson Co., Ltd.

Yasuhiro Otsuji

Kenji Takamiya

Tamotsu Iwata

Kazuki Yamada

Toshimichi Tanaka

Ryo Kikuchi

Shunya Yamazaki

Takeshi Kakamu

Masashi Fumoto

In a linear motion guide unit, a raceway groove formed in a casing of a slider includes a first raceway surface extending along the length direction of the slider and a second raceway surface facing the first raceway surface and extending along the length direction of the slider. The second raceway surface includes a first portion including a center portion in a length direction of the casing, and a second portion including end portions in the length direction of the casing and having a wall surface shape different from a wall surface shape of the first portion. In the first portion, the first raceway surface and the second raceway surface define a symmetric Gothic arch groove, and in the second portion, the second raceway surface has a surface recessed from a position symmetric to the first raceway surface.

Linear motion guide unit

A linear motion guide unit is disclosed in which an end cap of a slider has a tube therein to feed even minor amounts of lubricant into a circulating circuit for rollers with no lubricant leakage, making sure of positive lubrication irrespective of working orientations or postures of the linear motion guide unit. A flexible tube made of fluorocarbon polymers is installed in the end cap to run from a lubricant inlet to a turnaround passage, thereby providing a lubricant-supply passage. A distal end of the tube fits into a three-way member made open to the turnaround passage on a spacer part, which is nested inside the end cap.

A miniature linear motion guide unit can eliminate the need for additional machining on a track rail, and thus improve the accuracy of the track rail and reduce the manufacturing costs. A track rail (R) having raceway grooves () is fixed to a mounting surface by a fixing member (A). A slider (S) straddles and moves on the track rail. The fixing member has a recessed groove () formed in an opposing mounting face () facing the mounting surface and straddling the track rail. Part of the recessed groove is in contact with the track rail when the recessed groove straddles the track rail. A mounting hole () is drilled in a portion of the recessed groove of the fixing member away from the track rail. A stopper member () such as a bolt is inserted in the mounting hole and fixed to the mounting surface.

Miniature linear motion guide unit

Growing community of inventors

Gifu-ken, Japan

Yasuhiro Otsuji